Quote Originally Posted by JohnnyMcKinney View Post
Actually offline achievements do not get a time stamp. Due to people being able to change their time MS made it so only online achievements get time stamps. However even if you did do it offline you would not be able to log into Xbox Live until the game was released, since Bungie is doing checks for any achievements that have been unlocked before the release date.
Overall i wouldnt say its worth it to download the ISO just for offline campain...i mean your screwed until it comes out of it sucks lol